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US 4,377,057 AGranted
Hand cabbing apparatus
AssigneeLortone, Inc.
InventorPhilip J. Pincha
Life of this patent
Estimating the term…
Abstract
Apparatus, including a kit and elements thereof, for manually producing cabochons from various types of rocks and gemstones such as onyx, agate, opal, jade, etc. The kit contains all necessary equipment for hobbyists and craftsman to shape and polish gemstones from preform pieces of rock or stone. Also disclosed are various novel embodiments of base frames and attachment means for fixedly securing abrasive and polishing media to the base frame.
Claims2
Cabbing apparatus comprising:
- an elongated frame providing a pair of longudinal side walls and a bottom wall therebetween, said bottom wall having a convex exterior surface interrupted by grit collection groove and an inner surface, said grooves extending longitudinally of the frame,
- an abrasive sheet,
- retaining means opposing the outside of said side walls for holding said abrasive sheet in working position gripped between the retaining means and the side walls and spaced above the inner surface of the bottom wall or engaging the convex exterior surface thereof, said retaining means including a pair of longitudinal side rails holding side edge portions of said sheet against said side walls and a pair of elastic bands stretched around said side rails near the ends thereof to hold the side rails in position, and
- end walls on the frame connecting the side walls and having a curved, concave upper wall to define the concavity for dishing the abrasive sheet downwardly when it is held spaced above the inner surface of the bottom wall.
1 more element
Dependencies are inferred from the claim text.